public static void main(String[] args) {
        String s = "step :9asdfsad";
        Matcher m = Pattern.compile("step\\s*:(\\d+)").matcher(s);
        while(m.find()){
            System.out.println(m.group(1));
        }
    }

------解决方案--------------------

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Java code

    public static void main(String[] args) {
        String s = "step :9asdfsad";
        Matcher m = Pattern.compile("step\\s*:(\\d+)").matcher(s);
        while(m.find()){
            S……